I have setup a procurement category that I want to use for vendor prepayments, and this category has been setup with "Calculate withholding tax" = Yes and with a specific item withholding tax group (see below)
However, when using this item category to register a prepayment and when I create the prepayment invoice, the Item withholding tax group is NOT inherited from the procurement category setup (only the Item sales tax group is).
Does anyone know why item withholding tax group is not passed on to the prepayment invoice? Is this a bug, or is there something I am missing here?